Leon Cohen

Q: What Schools Are Affiliated With Leon Cohen

Leon Cohen is affiliated with the following schools: Yale University, California Institute of Technology, Hunter College, Stanford University

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Leon Cohen

Computer Science

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Machine Learning

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Artificial Intelligence

#626

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Database

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Computer Science

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PhD Computer Science Stanford University
Masters Computer Science Stanford University

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Leon Cohen's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Time-frequency distributions-a review (1989) (3593)
Generalized Phase-Space Distribution Functions (1966) (1062)
Time Frequency Analysis: Theory and Applications (1994) (682)
The scale representation (1993) (242)
Positive time-frequency distribution functions (1985) (151)
A numerical integration scheme for the N-body gravitational problem (1973) (142)
Hierarchy equations for reduced density matrices (1976) (131)
Local kinetic energy in quantum mechanics (1979) (115)
Instantaneous Frequency, Its Standard Deviation And Multicomponent Signals (1988) (109)
Positive quantum joint distributions (1980) (105)
The Weyl Operator and its Generalization (2012) (80)
Quantization problem and variational principle in the phase‐space formulation of quantum mechanics (1976) (75)
Fitting the Mel scale (1999) (74)
What is a multicomponent signal? (1992) (70)
Scale transform in speech analysis (1999) (68)
The uncertainty principle: global, local, or both? (2004) (66)
Representable local kinetic energy (1984) (64)
Instantaneous bandwidth for signals and spectrogram (1990) (63)
Joint Wigner distribution for spin-1/2 particles (1986) (62)
On an ambiguity in the definition of the amplitude and phase of a signal (1999) (62)
Can Quantum Mechanics Be Formulated as a Classical Probability Theory? (1966) (60)
The history of noise [on the 100th anniversary of its birth] (2005) (60)
The history of noise (2004) (58)
Generalization of the Wiener-Khinchin theorem (1998) (56)
The Wigner distribution for classical systems (2002) (55)
Probability distributions with given multivariate marginals (1984) (52)
Distributions concentrated along the instantaneous frequency (1990) (52)
A Wigner approximation method for wave propagation (2005) (50)
CONDITIONAL MOMENTS ANALYSIS OF TRANSIENTS WITH APPLICATION TO HELICOPTER FAULT DATA (2000) (48)
Hamiltonian Operators via Feynman Path Integrals (1970) (42)
Frequency warping and the Mel scale (2002) (42)
Generalized ambiguity functions (1985) (41)
Exact reduced density matrices for a model problem (1985) (41)
Local values in quantum mechanics (1996) (37)
Correspondence rules and path integrals (1976) (36)
A general approach for obtaining joint representations in signal analysis. I. Characteristic function operator method (1996) (35)
Instantaneous 'anything' (1993) (32)
Standard deviation of instantaneous frequency (1989) (31)
Quasi-probability distributions for arbitrary operators (1987) (31)
Direct time-frequency characterization of linear systems governed by differential equations (2004) (31)
The uncertainty principle in signal analysis (1994) (30)
Dispersion-invariant features for classification. (2008) (29)
General approach for obtaining joint representations in signal analysis and an application to scale (1991) (29)
Hartree–Fock density matrix equation (1976) (29)
Advances in Nonlinear Signal and Image Processing (2006) (28)
On joint distributions for arbitrary variables (1995) (28)
On a fundamental property of the Wigner distribution (1987) (28)
Segmentation, autofocusing and signagture extraction of tuberculosis sputum images (2002) (27)
Frequency-warping in speech (1996) (26)
Numerical experiments on Lynden-Bell's statistics (1971) (25)
The generalization of the Wiener-Khinchin theorem (1998) (24)
Dispersion, Its Effects, and Compensation (2007) (23)
Frequency-warping and speaker-normalization (1997) (23)
leID1. Time-frequency analysis: Theory and applications (2013) (23)
Rules of probability in quantum mechanics (1988) (23)
The Uncertainty Principle for the Short-Time Fourier Transform and Wavelet Transform (2001) (22)
On analytic signals with nonnegative instantaneous frequencies (1999) (22)
Exact and approximate moments of a propagating pulse (2008) (21)
Phase-space approach to wave propagation with dispersion and damping (2004) (21)
Probabilities in Quantum Mechanics (1967) (21)
Local Bandwidth And Optimal Windows For The Short Time Fourier Transform (1989) (20)
Moment features invariant to dispersion (2004) (20)
Wigner distribution and pulse propagation (2001) (20)
The uncertainty principles of windowed wave functions (2000) (19)
Time‐Frequency Spatial‐Spatial Frequency Representations a (1997) (19)
Uncertainty principles of the short-time Fourier transform (1995) (18)
Image filtering and denoising through the scale transform (1998) (18)
Convolution, filtering, linear systems, the Wiener-Khinchin theorem: generalizations (1992) (18)
Expansion Theorem for Functions of Operators (1966) (18)
Classical, Semi-classical and Quantum Noise (2011) (16)
Denoising using time-frequency and image processing methods (1999) (16)
Instantaneous frequency and group delay of a filtered signal (2000) (16)
Instantaneous frequency and time-frequency distributions (1989) (15)
WIGNER DISTRIBUTIONS Local properties of dispersive pulses (2002) (15)
Approximate wave function from approximate non-representable Wigner distributions (2008) (15)
Time-frequency approach to radar detection, imaging, and classification (2010) (15)
Recent Developments in Time-Frequency Analysis (1998) (14)
Nonlinear Transformation of Differential Equations into Phase Space (2004) (14)
Wigner distribution for finite duration or band-limited signals and limiting cases (1987) (13)
Dynamics using the Wigner distribution (2000) (13)
Generalization of the Gram-Charlier/Edgeworth Series and Application to Time-Frequency Analysis (1998) (13)
Conditional expectation values in quantum mechanics (1987) (12)
Wavelet moments and time-frequency analysis (1999) (12)
Generalized Wigner distributions, moments and conditional correspondence rules (2002) (12)
The Wavelet Transform and Time-Frequency Analysis (2003) (12)
Time-Frequency Wigner Distribution Approach To Differential Equations (2003) (12)
A general approach for obtaining joint representations in signal analysis. II. General class, mean and local values, and bandwidth (1996) (12)
Approximation of the Wigner Distribution for Dynamical Systems Governed by Differential Equations (2002) (12)
Scale in images (1996) (11)
Recognition of propagating vibrations and invariant features for classification (2006) (11)
Current and quasi-probability phase-space distributions (2003) (10)
Nonstationary stochastic differential equations (2006) (10)
Working in phase‐space with Wigner and Weyl (2017) (10)
A neural network approach to the detection problem using joint time-frequency distributions (1990) (10)
The phase space of non-stationary noise (2004) (9)
Scale and harmonic-type signals (1994) (9)
A phase space approach to wave propagation with dispersion. (2015) (9)
The tensor virial theorem in quantum mechanics (1978) (8)
The Generalized Wiener Process for Colored Noise (2006) (8)
Improved scale-cepstral analysis in speech (1998) (8)
The speech scale (2002) (8)
Inverse Weyl transform/operator (2017) (7)
Distributions in signal theory (1984) (7)
Classification of digital modulation types (1995) (7)
Covariance for quasi-probability distributions (1976) (7)
Joint Probability Distributions in Quantum Mechanics (1973) (7)
Wigner distribution for random systems (2002) (7)
Scale-invariant speech analysis via joint time-frequency-scale processing (1995) (7)
Book ReviewFormulation of classical and quantum dynamical theory : Gerald Rosen. 161 pages, diagrams, 6 x 9 in. New York, Academic Press, 1970. Price, $9.50 (approx. £3·65). (1973) (7)
Pulse propagation and windowed wave functions (2014) (7)
EPRB and the Wigner Distribution for Spin‐1/2 Particles a (1986) (7)
Why do wave packets sometimes contract? (2002) (6)
Warping functions in speech (1998) (6)
Characterization of transients (1997) (6)
Construction and transformation of probability densities (2005) (6)
Momentum spread: Amplitude and current contributions (1990) (6)
Time-Frequency Analysis of a Variable Stiffness Model for Fault Development (2002) (6)
Joint representation in time and frequency scale for harmonic type signals (1994) (6)
Wigner equations of motion for classical systems (2000) (6)
Topics in time-frequency representations (1996) (5)
Equations of motion for rays in a Snell's law medium. (2015) (5)
Path-Integral Approach (2021) (5)
Editorial Time-frequency approach to radar detection, imaging, and classification (2010) (5)
Detection of false transients (2005) (5)
Preface to the Special Issue on Time-Frequency Analysis (1996) (5)
Local stationarity and time-frequency distributions (2006) (5)
Stationary phase approximation: a modification (2004) (5)
Power cepstral image analysis through the scale transform (2000) (5)
Local signal to noise ratio (2006) (5)
On the generalization of the Edgeworth/Gram-Charlier series (2011) (5)
A joint distribution approach to wave propagation and array processing (2004) (5)
Instantaneous frequency of a propogating pulse (1997) (5)
From von Neumann to Wigner and beyond (2019) (5)
A time-frequency approach to the adjustable bandwidth concept (2006) (5)
Positive and Negative Joint Quantum Distributions (1986) (5)
Wave propagation with dispersion and damping (2004) (4)
Phase-Space Differential Equations for Modes (2009) (4)
Wigner quasi-distributions for arbitrary operators (2004) (4)
Local virial and tensor theorems. (2011) (4)
Signal-Adapted Multiresolution Transform for Image Coding (1992) (4)
Positive Time–Frequency Distributions (2018) (4)
Propagation in channels (2013) (4)
What is the Wigner Function Closest to a Given Square Integrable Function? (2018) (4)
Modes and Noise Propagation in Phase Space (2015) (4)
Time-frequency characterization of random systems (2003) (4)
INSTANTANEOUS MEAN QUANTITIES IN TIMEFREQUENCY ANALYSIS (1988) (4)
Generalized Phase-Space Distributions (2013) (4)
Generalization of group velocity and group acceleration (2002) (3)
Instantaneous bandwidth (2015) (3)
Quasi-distributions for arbitrary non-commuting operators (2020) (3)
Generalization of Campbell's theorem to nonstationary noise (2014) (3)
Moments in history. (2010) (3)
Phase space approach to wave propagation using windowed wave functions (2016) (3)
A Review of Brownian Motion Based Solely on the Langevin Equation with White Noise (2015) (3)
An Equation for the Uncertainty of AN Operator and its Interpretation in Terms of Local Values (1992) (3)
Texture discrimination using the Wigner-Ville distribution (2003) (3)
Locally Stationary Noise and Random Processes (2006) (3)
Wavelets: A comparison with the spectrogram and other methods for time‐frequency analysis. (2010) (3)
Time frequency filtering (1988) (3)
Construction of time-frequency distributions for fields (2008) (3)
Joint Quantum Probabilities and the Uncertainty Principle (1986) (3)
M-indeterminate distributions in quantum mechanics and the non-overlapping wave function paradox (2018) (3)
A note on 'Wigner distribution for finite duration or band-limited signals and limiting cases [and author's reply] (1988) (3)
Transformation of Operators (1966) (3)
Constructing densities from moments (2007) (3)
The marginals and time-frequency distributions (2003) (3)
Time-frequency Wigner evolution of the quantum Langevin equation (2005) (3)
Time-frequency analysis of econometric time series (2007) (3)
Nonstationary and stationary noise (2006) (3)
The eigenvalue problem in phase space (2018) (3)
Probability distribution for intensity for a reverberation model (2011) (3)
Contraction of Pulses (2002) (3)
Time-Evolution of the Power Spectrum of the Black Hole X-ray Nova XTE J1550-564 (2001) (3)
Time-frequency analysis of harmonic oscillator motion (1998) (3)
Properties of the positive time-frequency distribution functions (1985) (3)
Time-frequency approach to radar, sonar and seismic wave propagation with dispersion and attenuation (2010) (3)
Wigner equation of motion for time-dependent potentials (2002) (3)
Phase Space Approach and Approximations for Wave Propagation (2007) (2)
Wigner Distributions as Representations of the Density Matrix (1987) (2)
The instantaneous spectral band (1994) (2)
Scale-transform-based features for application in speech recognition (1999) (2)
Time-frequency analysis of automobile road data (1999) (2)
A Primer On Time-Frequency Analysis - Introduction (1992) (2)
Construction of time-frequency representations from moments (2007) (2)
The autocorrelation function for inverse square forces (1972) (2)
The scintillation index for reverberation noise (2012) (2)
Reverberation noise in phase-space (2010) (2)
Are There Quantum Operators and Wave Functions in Standard Probability Theory (2017) (2)
Transformation of distributions into heavy tailed (2016) (2)
Cloud denoising (2004) (2)
Reduced density matrix equations and functionals for correlation energy (2009) (2)
Transformation of time dependent probability distributions (2009) (2)
Generalization of the Edgeworth and Gram-Charlier series and quasi-probability densities (Wavelet analysis and signal processing) (2017) (2)
Volumetric image fusion using the pseudo-Wigner distribution (2004) (2)
Joint distributions for arbitrary variables (1994) (2)
Application of time-frequency methods to sound-quality analysis in automobiles (1999) (2)
Noise and Fluctuations in Photonics, Quantum Optics, and Communications (2007) (2)
Integration of the N body gravitational problem by separation of the force into a near and a far component (1974) (2)
Positive Time‚ÄìFrequency Distributions and Acoustic Echoes (2002) (2)
Higher-order dispersion in a propagating pulse (2000) (2)
Multipart wave functions (1992) (2)
Instantaneous Spectrum Estimation from Event-Based Densities (2002) (1)
The Weyl Operator (2013) (1)
Estimating speaker scale factors from vowels (2003) (1)
Deriving uniformly spaced samples from a nonuniformly sampled function via time warping with applications to fast transforms (2004) (1)
TIME-FREQUENCY ANALYSIS OF ACOUSTIC SCATTERING (1990) (1)
The description of nonstationary noise (2004) (1)
Variance of a Nonstationary Random Process (2006) (1)
Time-varying noise (2004) (1)
Joint position/wave number and time/frequency features of signals. (2009) (1)
Correlation energy for a slater determinant fitted to the electron density (2009) (1)
Phase-amplitude study of clouds (2002) (1)
The Propagation of Noise Fields in a Dispersive Medium (2012) (1)
Solution of differential equations using the smoothed Wigner distribution (2001) (1)
Time-Frequency Analysis: What We Know and What We Don’t (2020) (1)
Series Expansion for a Propagating Pulse (1997) (1)
Hartree‐fock density matrix equation: Open‐shell systems (2009) (1)
Instantaneous mean qualities in time-frequency analysis (1988) (1)
Exact and approximate moments for dispersive pulse propagation (2008) (1)
Correlation hole for an exactly solvable problem (1983) (1)
The conditional Weyl transform and its generalization (2013) (1)
Nonstationary noise propagation with sources (2014) (1)
Estimating the instantaneous power spectrum of an x-ray binary system (2001) (1)
The Probabilistic Nature of Quantum Mechanics (2007) (1)
Numerical experiments on the statistics of the gravitational field (1974) (1)
A Wigner Distribution Approximation Method for Ordinary Differential Equations (2001) (1)
Transformation of quasi-distributions (2018) (1)
Hierarchy equations for reduced density matrices in different representations (1986) (1)
Wigner distribution for operators at different times (2006) (1)
Generating M-Indeterminate Probability Densities by Way of Quantum Mechanics (2020) (1)
Classical and Quantum Random Processes (2006) (1)
Linear invariant systems (2007) (1)
Schrödinger and Heisenberg formulation of classical pulse propagation with dispersion and attenuation (2017) (1)
Transforming convolution and correlation (2001) (1)
A local energy method based on the reduced density matrix equations (2009) (1)
Bohmian and quantum phase space distribution expansions and approximations (2014) (1)
Time‐frequency description of signals—A review (1993) (1)
Time-frequency analysis of classical and quantum noise (2006) (1)
Correlation hole and physical properties: A model calculation (1986) (1)
Construction and correction of probability densities (2007) (1)
Reverberation in a dispersive medium (2010) (1)
On the 1/f model for cloud generation (2004) (1)
Time-Frequency and Pulse Propagation in Dispersive Media (2003) (1)
Wigner distribution for radar waves incident upon a metallic half-space (2001) (0)
Operator Transformation of Probability Densities (2019) (0)
Wave propagation in phase‐space. (2009) (0)
Modified Hamiltonian for a particle in an infinite box that includes wall effects (2022) (0)
The conditional Weyl transform and its generalization (2012) (0)
The instantaneous frequency of a propagating pulse (1997) (0)
Recent developments in time-frequency analysis : a special issue of Multidimensional systems and signal processing, an international journal/ edited by Leon Cohen, Patrick Loughlin (1998) (0)
Weyl Rule and Pseudo-Differential Operators for Arbitrary Operators (2011) (0)
Bohm trajectories for wave propagation (2009) (0)
Models for non-stationary reverberation noise (2013) (0)
Arbitrary Operators: Single Operator (2013) (0)
Time‐frequency‐scale description of signals (1998) (0)
Classification of transforms (2000) (0)
Time-varying spectral analysis in exercise and sport science (2007) (0)
Further experimental results on the speech-hearing connection (2001) (0)
Probability densitites and pulses (1998) (0)
On a modification of the Newtonian particle view of rays (2015) (0)
The effects of higher higher-order dispersion on pulse propagation (2022) (0)
Time-frequency representations and operators (2009) (0)
AFRL-RI-RS-TR-2008-4 Final Technical Report January 2008 SIGNAL AND IMAGE PROCESSING IN DIFFERENT REPRESENTATIONS (2007) (0)
Phase-space equation for wave equations (2013) (0)
An approximation method for dispersive wave propagation (2015) (0)
The Pendulum: A Time-Frequency Model (2000) (0)
Time-Frequency Operators (2013) (0)
On the 100th anniversary of its birth ) The History of Noise The History of Noise (2005) (0)
Time-frequency representations of astronomical signals (1997) (0)
Spectral modeling of nonstationary clouds (2005) (0)
CY ANALYSIS USTIC SCATTERING (1990) (0)
Signal and Image Processing in Different Representations (2008) (0)
How Does One Describe A Time-Varying Statistical Spectrum: Transforming Stochastic Differential Equations Into Phase-Space (2005) (0)
Introduction and Terminology (2013) (0)
The speech scale and spectral transformation (2005) (0)
Joint positive distributions of time (1985) (0)
A Random Nonstationary Pulse Train Model (2021) (0)
Operator relations, the eigenvalue problem, and representability for quantum phase space distributions (1987) (0)
Tracking noise in noise. (2011) (0)
Characterization of densities by moments (1999) (0)
Random Walk with Transition Probabilities That Depend on Direction of Motion (1964) (0)
Time-frequency methods for biological signal estimation (2000) (0)
High-resolution formant estimation and its application in frequency scaling of speech (2000) (0)
The propagation of noise in a dispersive medium. (2009) (0)
The Spread of a Noise Field in a Dispersive Medium (2010) (0)
Space-time autocorrelation function for reverberation propagation in a dispersive medium (2011) (0)
Authors' Reply (2003) (0)
Reply to: ‘Comment on “wigner equation of motion for time-dependent potentials”’ by besieris and davis (2003) (0)
The hypervirial and viral theorems in terms of Weyl symbols (2018) (0)
Arbitrary operators: Two Operators (2013) (0)
Two Approaches to Nonstationary Linear Invariant Systems Governed by Differential Equations (2000) (0)
Uncertainty Principle for Arbitrary Operators (2013) (0)
Generalized Operator Association (2013) (0)
Propagation in a dispersive medium: a phase‐space approach (2008) (0)
Wigner–Ville representations for acoustic source localization (2002) (0)
Statistics of a space-time random pulse train. (2016) (0)
Clutter model with dispersion (2009) (0)
A study of the Colle‐Salvetti functional for ρ2 via an exactly soluble problem (2009) (0)
Joint Spatial/Spatial‐Frequency Representations (2011) (0)
PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ORGANIZATION. 1. REPORT DATE (DD-MM-YYYY) (2009) (0)
Characteristic function and operator approach to M-indeterminate probability densities (2022) (0)
Guest Editorial (1998) (0)
Generalization of the autocorrelation function (1998) (0)
Cross time frequency spectra applied to automotive brake noise (2002) (0)
Pulse propagation in wavelet phase space (2016) (0)
Transformation of operators and scale (1994) (0)
Positive Time–Frequency Distributions and Acoustic Echoes (2018) (0)
A local particle‐like approach to wave propagation (2007) (0)
The speech scale, the Mel scale, and the tube model for speech (2002) (0)
Probability densities and pulses (1998) (0)
Joint distributions, the uncertainty principle and positive distributions† (2014) (0)
Reply to 'Comments on 'The generalized Wiener process for colored noise'" (2007) (0)
Global and local translation and magnification (1997) (0)
Local particle view of a propagating pulse (2001) (0)
A probabilistic particle view of a propagating pulse (2000) (0)
Psychoacoustic frequency scales versus frequency warping in scale cepstrum (1996) (0)
Phase Space Analysis of the Telegraph Equation (2022) (0)
Manifestly positive series approximation to probability densities (2019) (0)
The Khintchine Theorem and Characteristic Function Representability (2013) (0)
A New Approach to the Characterization and Detection of Nonstationary Environments and Channels (2009) (0)
Improvements in scale-transform-based features for speech analysis (1997) (0)
Time-varying spectrum of the random string (2022) (0)
Contracted Schrödinger equation in quantum phase‐space (2018) (0)
From von Neumann to Wigner and beyond (2019) (0)
Propagation equations for non‐stationary noise in waveguides. (2010) (0)
The speech scale. (2010) (0)
Fluctuations in speech (2007) (0)
Transformation of Differential Equations Into Phase Space (2013) (0)
Time-varying spectral analysis of astronomical time series (2007) (0)

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Leon Cohen is affiliated with the following schools:

Leon Cohen's Academic­Influence.com Rankings

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Similar Degrees You Can Earn

Why Is Leon Cohen Influential?

Leon Cohen's Published Works

Published Works

What Schools Are Affiliated With Leon Cohen?

Leon Cohen's AcademicInfluence.com Rankings